This is book number 4 in the Gundam series.
A giant, deadly battle robot--RX-78-2 Gundam--and its teenage pilot Amuro Ray are the heart of one of the most popular series in manga history, and the story of its genesis continues with this fourth installment of The Origin. Caught in the crossfire of an outer space war between the Earth Federation and the invading Principality of Zeon, mechanic-turned-robot-jockey Amuro boards and commands the Gundam. Thrust into the front lines defending those he loves from a silent enemy, can Amuro and the Gundam save the colony's survivors or destroy them?
Although he began his career as an animator, the honored author of Gundam, Yoshikazu Yasuhiko, was the winner of the Japanese Sci-Fi Association's Nebula Award and the Grand Prize from the Japan Comic Artist Association.